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deepseek 4.1 flash 1017
Turn one plain-language wish into a playable game or 3D scene with DeepSeek 4.1 Flash 1017 — quicker, cheaper and sharper on web, app and API.
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What the New Flash Release Changes
This release pushes quality and cost in the same direction at once: benchmark numbers rise, runs finish earlier and replies come back shorter — all shaped for building whole projects rather than patching single lines.
- Better Scores, Lower SpendBenchmark results improve while jobs complete in less time and the answers themselves shed length — both sides of the ledger gain instead of one paying for the other.
- Whole Projects From One WishReinforcement learning with self-feedback keeps the model on task across an entire build — a racing game, a Forbidden City model, a 3D timeline of the eras — not just a fragment.
- Weights Released OpenlyYou can pull the weights from Hugging Face or ModelScope and run the release on your own hardware instead of depending on a hosted endpoint.
Three Ways Into the Flash Release
Pick the path that fits your team: hosted surfaces, the Harness upgrade, or the Search and Fetch endpoints.
Search, Fetch, Vision and Pricing at a Glance
Live web access, image understanding and success-only billing — the parts that let the model read the open web and see pictures.
Search API, Built In-House
A query comes back as structured page results from DeepSeek's own crawler and engine, an index that absorbs hundreds of millions of calls a day worldwide.
Fetch Returns Markdown
One page per request, delivered as clean Markdown, so agents and RAG pipelines get live web text they can use directly.
Vision Inputs Alongside Text
The deepseek-flash model reads pictures next to prompts — captioning a photo, lifting wording from a screenshot or interpreting a chart — across JPEG, PNG, GIF and WebP.
Three Ways to Send an Image
Pass base64 data URLs, public http(s) links or Files API file_ids; inline payloads share a 48 MiB body limit while uploaded files can go up to 64 MiB.
Pay Only for Successful Calls
$0.75 per 1,000 calls, charged only when a request returns something — failures, empty searches and timeouts are not billed.
Tuned for Popular Coding Agents
DeepSeek Harness, Tencent CodeBuddy and WorkBuddy are already optimized for it, and server-side Search and Fetch stay free for API users until billing opens.
DeepSeek 4.1 Flash 1017 — Common Questions
Answers on the release itself, its API endpoints and the open weights.
What exactly is DeepSeek-V4.1-Flash-1017?
DeepSeek's latest Flash build. It posts stronger benchmark scores, closes tasks faster and answers with less text, and it already handles live traffic across web, app and API.
How is it different from the version before?
It does not sacrifice quality to cut cost — scores and speed both improve while output shrinks, which is the Pareto idea in practice.
Which tools already support it?
DeepSeek Harness v0.2.1-rc.1 and newer, Tencent CodeBuddy, WorkBuddy and several other optimized integrations.
Do Search and Fetch cost anything?
Server-side Search and Fetch inside Harness, Claude Code and Codex remain free for DeepSeek API users for now; charges begin Oct 31, 2026 at 16:00 UTC.
Where do I get the open-source weights?
Both Hugging Face and ModelScope host them under the DeepSeek-V4.1-Flash-1017 repository name.
Which image formats can it read?
JPEG, PNG, GIF and WebP. The model inspects the raw bytes, so a wrong extension or a mislabeled MIME type will not confuse it.
Start Building With the Flash Model
Head to the website, app or API to try it, run DeepSeek Harness v0.2.1-rc.1 or newer, and grab the open weights from Hugging Face or ModelScope.